aboutsummaryrefslogtreecommitdiff
path: root/gdb/xcoffread.c
blob: 0cf93714821db9684c566f6e24c6e5cf8977364f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
/* Read AIX xcoff symbol tables and convert to internal format, for GDB.
   Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 1997
   	     Free Software Foundation, Inc.
   Derived from coffread.c, dbxread.c, and a lot of hacking.
   Contributed by IBM Corporation.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "bfd.h"

#include <sys/types.h>
#include <fcntl.h>
#include <ctype.h>
#include "gdb_string.h"

#include <sys/param.h>
#ifndef	NO_SYS_FILE
#include <sys/file.h>
#endif
#include "gdb_stat.h"

#include "coff/internal.h"
#include "libcoff.h"		/* FIXME, internal data from BFD */
#include "coff/rs6000.h"

#include "symtab.h"
#include "gdbtypes.h"
#include "symfile.h"
#include "objfiles.h"
#include "buildsym.h"
#include "stabsread.h"
#include "expression.h"
#include "language.h"		/* Needed inside partial-stab.h */
#include "complaints.h"

#include "gdb-stabs.h"

/* For interface with stabsread.c.  */
#include "aout/stab_gnu.h"

/* For interface with partial-stab.h.  */
#define N_UNDF	0	/* Undefined symbol */
#undef N_ABS
#define N_ABS 2
#define N_TEXT 	4	/* Text sym -- defined at offset in text seg */
#define N_DATA 	6	/* Data sym -- defined at offset in data seg */
#define N_BSS 	8	/* BSS  sym -- defined at offset in zero'd seg */
#define	N_COMM	0x12	/* Common symbol (visible after shared lib dynlink) */
#define N_FN	0x1f	/* File name of .o file */
#define	N_FN_SEQ 0x0C	/* N_FN from Sequent compilers (sigh) */
/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
   N_DATA, or N_BSS.  When the low-order bit of other types is set,
   (e.g. N_WARNING versus N_FN), they are two different types.  */
#define N_EXT 	1	/* External symbol (as opposed to local-to-this-file) */
#define N_INDR 0x0a

/* The following symbols refer to set elements.
   All the N_SET[ATDB] symbols with the same name form one set.
   Space is allocated for the set in the text section, and each set
   elements value is stored into one word of the space.
   The first word of the space is the length of the set (number of elements).

   The address of the set is made into an N_SETV symbol
   whose name is the same as the name of the set.
   This symbol acts like a N_DATA global symbol
   in that it can satisfy undefined external references.  */

/* These appear as input to LD, in a .o file.  */
#define	N_SETA	0x14		/* Absolute set element symbol */
#define	N_SETT	0x16		/* Text set element symbol */
#define	N_SETD	0x18		/* Data set element symbol */
#define	N_SETB	0x1A		/* Bss set element symbol */

/* This is output from LD.  */
#define N_SETV	0x1C		/* Pointer to set vector in data area.  */

/* We put a pointer to this structure in the read_symtab_private field
   of the psymtab.  */

struct symloc {

  /* First symbol number for this file.  */

  int first_symnum;

  /* Number of symbols in the section of the symbol table devoted to
     this file's symbols (actually, the section bracketed may contain
     more than just this file's symbols).  If numsyms is 0, the only
     reason for this thing's existence is the dependency list.  Nothing
     else will happen when it is read in.  */

  int numsyms;

  /* Position of the start of the line number information for this psymtab.  */
  unsigned int lineno_off;
};

/* Remember what we deduced to be the source language of this psymtab. */

static enum language psymtab_language = language_unknown;


/* Simplified internal version of coff symbol table information */

struct coff_symbol {
  char *c_name;
  int c_symnum;		/* symbol number of this entry */
  int c_naux;		/* 0 if syment only, 1 if syment + auxent */
  long c_value;
  unsigned char c_sclass;
  int c_secnum;
  unsigned int c_type;
};

/* last function's saved coff symbol `cs' */

static struct coff_symbol fcn_cs_saved;

static bfd *symfile_bfd;

/* Core address of start and end of text of current source file.
   This is calculated from the first function seen after a C_FILE
   symbol. */


static CORE_ADDR cur_src_end_addr;

/* Core address of the end of the first object file.  */

static CORE_ADDR first_object_file_end;

/* initial symbol-table-debug-string vector length */

#define	INITIAL_STABVECTOR_LENGTH	40

/* Nonzero if within a function (so symbols should be local,
   if nothing says specifically).  */

int within_function;

/* Size of a COFF symbol.  I think it is always 18, so I'm not sure
   there is any reason not to just use a #define, but might as well
   ask BFD for the size and store it here, I guess.  */

static unsigned	local_symesz;

struct coff_symfile_info {
  file_ptr min_lineno_offset;		/* Where in file lowest line#s are */
  file_ptr max_lineno_offset;		/* 1+last byte of line#s in file */

  /* Pointer to the string table.  */
  char *strtbl;

  /* Pointer to debug section.  */
  char *debugsec;

  /* Pointer to the a.out symbol table.  */
  char *symtbl;

  /* Number of symbols in symtbl.  */
  int symtbl_num_syms;

  /* Offset in data section to TOC anchor.  */
  CORE_ADDR toc_offset;
};

static struct complaint storclass_complaint =
  {"Unexpected storage class: %d", 0, 0};

static struct complaint bf_notfound_complaint =
  {"line numbers off, `.bf' symbol not found", 0, 0};

static struct complaint ef_complaint = 
  {"Mismatched .ef symbol ignored starting at symnum %d", 0, 0};

static struct complaint eb_complaint = 
  {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};

static void
xcoff_initial_scan PARAMS ((struct objfile *, struct section_offsets *, int));

static void
scan_xcoff_symtab PARAMS ((struct section_offsets *, struct objfile *));

static char *
xcoff_next_symbol_text PARAMS ((struct objfile *));

static void
record_include_begin PARAMS ((struct coff_symbol *));

static void
enter_line_range PARAMS ((struct subfile *, unsigned, unsigned,
			  CORE_ADDR, CORE_ADDR, unsigned *));

static void
init_stringtab PARAMS ((bfd *, file_ptr, struct objfile *));

static void
xcoff_symfile_init PARAMS ((struct objfile *));

static void
xcoff_new_init PARAMS ((struct objfile *));

static void
xcoff_symfile_finish PARAMS ((struct objfile *));

static struct section_offsets *
xcoff_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));

static void
find_linenos PARAMS ((bfd *, sec_ptr, PTR));

static char *
coff_getfilename PARAMS ((union internal_auxent *, struct objfile *));

static void
read_symbol PARAMS ((struct internal_syment *, int));

static int
read_symbol_lineno PARAMS ((int));

static int
read_symbol_nvalue PARAMS ((int));

static struct symbol *
process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *));

static void
read_xcoff_symtab PARAMS ((struct partial_symtab *));

#if 0
static void
add_stab_to_list PARAMS ((char *, struct pending_stabs **));
#endif

static int
compare_lte PARAMS ((const void *, const void *));

static struct linetable *
arrange_linetable PARAMS ((struct linetable *));

static void
record_include_end PARAMS ((struct coff_symbol *));

static void
process_linenos PARAMS ((CORE_ADDR, CORE_ADDR));


/* Translate from a COFF section number (target_index) to a SECT_OFF_*
   code.  */
static int secnum_to_section PARAMS ((int, struct objfile *));
static asection * secnum_to_bfd_section PARAMS ((int, struct objfile *));

struct find_targ_sec_arg {
  int targ_index;
  int *resultp;
  asection **bfd_sect;
};

static void find_targ_sec PARAMS ((bfd *, asection *, void *));

static void find_targ_sec (abfd, sect, obj)
     bfd *abfd;
     asection *sect;
     PTR obj;
{
  struct find_targ_sec_arg *args = (struct find_targ_sec_arg *)obj;
  if (sect->target_index == args->targ_index)
    {
      /* This is the section.  Figure out what SECT_OFF_* code it is.  */
      if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
	*args->resultp = SECT_OFF_TEXT;
      else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
	*args->resultp = SECT_OFF_DATA;
      else
	*args->resultp = SECT_OFF_BSS;
      *args->bfd_sect = sect;
    }
}

/* Return the section number (SECT_OFF_*) that CS points to.  */
static int
secnum_to_section (secnum, objfile)
     int secnum;
     struct objfile *objfile;
{
  int off = SECT_OFF_TEXT;
  asection *sect = NULL;
  struct find_targ_sec_arg args;
  args.targ_index = secnum;
  args.resultp = &off;
  args.bfd_sect = &sect;
  bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
  return off;
}

/* Return the BFD section that CS points to.  */
static asection *
secnum_to_bfd_section (secnum, objfile)
     int secnum;
     struct objfile *objfile;
{
  int off = SECT_OFF_TEXT;
  asection *sect = NULL;
  struct find_targ_sec_arg args;
  args.targ_index = secnum;
  args.resultp = &off;
  args.bfd_sect = &sect;
  bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
  return sect;
}

/* add a given stab string into given stab vector. */

#if 0

static void
add_stab_to_list (stabname, stabvector)
char *stabname;
struct pending_stabs **stabvector;
{
  if ( *stabvector == NULL) {
    *stabvector = (struct pending_stabs *)
	xmalloc (sizeof (struct pending_stabs) + 
			INITIAL_STABVECTOR_LENGTH * sizeof (char*));
    (*stabvector)->count = 0;
    (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
  }
  else if ((*stabvector)->count >= (*stabvector)->length) {
    (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
    *stabvector = (struct pending_stabs *)
	xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + 
	(*stabvector)->length * sizeof (char*));
  }
  (*stabvector)->stab [(*stabvector)->count++] = stabname;
}

#endif


/* Linenos are processed on a file-by-file basis.

   Two reasons:

    1) xlc (IBM's native c compiler) postpones static function code
       emission to the end of a compilation unit. This way it can
       determine if those functions (statics) are needed or not, and
       can do some garbage collection (I think). This makes line
       numbers and corresponding addresses unordered, and we end up
       with a line table like:
       

		lineno	addr
        foo()	  10	0x100
		  20	0x200
		  30	0x300

	foo3()	  70	0x400
		  80	0x500
		  90	0x600

	static foo2()
		  40	0x700
		  50	0x800
		  60	0x900		

	and that breaks gdb's binary search on line numbers, if the
	above table is not sorted on line numbers. And that sort
	should be on function based, since gcc can emit line numbers
	like:
	
		10	0x100	- for the init/test part of a for stmt.
		20	0x200
		30	0x300
		10	0x400	- for the increment part of a for stmt.

	arrange_linetable() will do this sorting.		

     2)	aix symbol table might look like:

		c_file		// beginning of a new file
		.bi		// beginning of include file
		.ei		// end of include file
		.bi
		.ei

	basically, .bi/.ei pairs do not necessarily encapsulate
	their scope. They need to be recorded, and processed later
	on when we come the end of the compilation unit.
	Include table (inclTable) and process_linenos() handle
	that.  */

/* compare line table entry addresses. */

static int
compare_lte (lte1p, lte2p)
     const void *lte1p;
     const void *lte2p;
{
  struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
  struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
  return lte1->pc - lte2->pc;
}

/* Given a line table with function entries are marked, arrange its functions
   in ascending order and strip off function entry markers and return it in
   a newly created table. If the old one is good enough, return the old one. */
/* FIXME: I think all this stuff can be replaced by just passing
   sort_linevec = 1 to end_symtab.  */

static struct linetable *
arrange_linetable (oldLineTb)
     struct linetable *oldLineTb;			/* old linetable */
{
  int ii, jj, 
      newline, 					/* new line count */
      function_count;				/* # of functions */

  struct linetable_entry *fentry;		/* function entry vector */
  int fentry_size;				/* # of function entries */
  struct linetable *newLineTb;			/* new line table */

#define NUM_OF_FUNCTIONS 20

  fentry_size = NUM_OF_FUNCTIONS;
  fentry = (struct linetable_entry*)
    xmalloc (fentry_size * sizeof (struct linetable_entry));

  for (function_count=0, ii=0; ii <oldLineTb->nitems; ++ii) {

    if (oldLineTb->item[ii].line == 0) {	/* function entry found. */

      if (function_count >= fentry_size) {	/* make sure you have room. */
	fentry_size *= 2;
	fentry = (struct linetable_entry*) 
	  xrealloc (fentry, fentry_size * sizeof (struct linetable_entry));
      }
      fentry[function_count].line = ii;
      fentry[function_count].pc = oldLineTb->item[ii].pc;
      ++function_count;
    }
  }

  if (function_count == 0) {
    free (fentry);
    return oldLineTb;
  }
  else if (function_count > 1)
    qsort (fentry, function_count, sizeof(struct linetable_entry), compare_lte);

  /* allocate a new line table. */
  newLineTb = (struct linetable *)
    xmalloc
      (sizeof (struct linetable) + 
       (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry));

  /* if line table does not start with a function beginning, copy up until
     a function begin. */

  newline = 0;
  if (oldLineTb->item[0].line != 0)
    for (newline=0; 
	newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
      newLineTb->item[newline] = oldLineTb->item[newline];

  /* Now copy function lines one by one. */

  for (ii=0; ii < function_count; ++ii) {
    for (jj = fentry[ii].line + 1;
	         jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; 
							 ++jj, ++newline)
      newLineTb->item[newline] = oldLineTb->item[jj];
  }
  free (fentry);
  newLineTb->nitems = oldLineTb->nitems - function_count;
  return newLineTb;  
}     

/* include file support: C_BINCL/C_EINCL pairs will be kept in the 
   following `IncludeChain'. At the end of each symtab (end_symtab),
   we will determine if we should create additional symtab's to
   represent if (the include files. */


typedef struct _inclTable {
  char		*name;				/* include filename */

  /* Offsets to the line table.  end points to the last entry which is
     part of this include file.  */
  int		begin, end;
  
  struct subfile *subfile;
  unsigned	funStartLine;			/* start line # of its function */
} InclTable;

#define	INITIAL_INCLUDE_TABLE_LENGTH	20
static InclTable  *inclTable;			/* global include table */
static int	  inclIndx;			/* last entry to table */
static int	  inclLength;			/* table length */
static int	  inclDepth;			/* nested include depth */

static void allocate_include_entry PARAMS ((void));

static void
record_include_begin (cs)
struct coff_symbol *cs;
{
  if (inclDepth)
    {
      /* In xcoff, we assume include files cannot be nested (not in .c files
	 of course, but in corresponding .s files.).  */

      /* This can happen with old versions of GCC.
	 GCC 2.3.3-930426 does not exhibit this on a test case which
	 a user said produced the message for him.  */
      static struct complaint msg = {"Nested C_BINCL symbols", 0, 0};
      complain (&msg);
    }
  ++inclDepth;

  allocate_include_entry ();

  inclTable [inclIndx].name  = cs->c_name;
  inclTable [inclIndx].begin = cs->c_value;
}

static void
record_include_end (cs)
struct coff_symbol *cs;
{
  InclTable *pTbl;  

  if (inclDepth == 0)
    {
      static struct complaint msg = {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
      complain (&msg);
    }

  allocate_include_entry ();

  pTbl = &inclTable [inclIndx];
  pTbl->end = cs->c_value;

  --inclDepth;
  ++inclIndx;
}

static void
allocate_include_entry ()
{
  if (inclTable == NULL)
    {
      inclTable = (InclTable *) 
	xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
      memset (inclTable,
	      '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
      inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
      inclIndx = 0;
    }
  else if (inclIndx >= inclLength)
    {
      inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
      inclTable = (InclTable *) 
	xrealloc (inclTable, sizeof (InclTable) * inclLength);
      memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH, 
	      '\0', sizeof (InclTable)*INITIAL_INCLUDE_TABLE_LENGTH);
    }
}

/* Global variable to pass the psymtab down to all the routines involved
   in psymtab to symtab processing.  */
static struct partial_symtab *this_symtab_psymtab;

/* given the start and end addresses of a compilation unit (or a csect,
   at times) process its lines and create appropriate line vectors. */

static void
process_linenos (start, end)
     CORE_ADDR start, end;
{
  int offset, ii;
  file_ptr max_offset =
    ((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
      ->max_lineno_offset;

  /* subfile structure for the main compilation unit.  */
  struct subfile main_subfile;

  /* In the main source file, any time we see a function entry, we
     reset this variable to function's absolute starting line number.
     All the following line numbers in the function are relative to
     this, and we record absolute line numbers in record_line().  */

  unsigned int main_source_baseline = 0;

  unsigned *firstLine;

  offset =
    ((struct symloc *)this_symtab_psymtab->read_symtab_private)->lineno_off;
  if (offset == 0)
    goto return_after_cleanup;

  memset (&main_subfile, '\0', sizeof (main_subfile));

  if (inclIndx == 0)
    /* All source lines were in the main source file. None in include files. */

    enter_line_range (&main_subfile, offset, 0, start, end, 
    						&main_source_baseline);

  else
    {
      /* There was source with line numbers in include files.  */
      main_source_baseline = 0;
      for (ii=0; ii < inclIndx; ++ii)
	{
	  struct subfile *tmpSubfile;

	  /* If there is main file source before include file, enter it.  */
	  if (offset < inclTable[ii].begin)
	    {
	      enter_line_range
		(&main_subfile, offset, inclTable[ii].begin - LINESZ,
		 start, 0, &main_source_baseline);
	    }

	  /* Have a new subfile for the include file.  */

	  tmpSubfile = inclTable[ii].subfile =
	    (struct subfile *) xmalloc (sizeof (struct subfile));

	  memset (tmpSubfile, '\0', sizeof (struct subfile));
	  firstLine = &(inclTable[ii].funStartLine);

	  /* Enter include file's lines now.  */
	  enter_line_range (tmpSubfile, inclTable[ii].begin, 
			    inclTable[ii].end, start, 0, firstLine);

	  if (offset <= inclTable[ii].end)
	    offset = inclTable[ii].end + LINESZ;
	}

      /* All the include files' line have been processed at this point.  Now,
	 enter remaining lines of the main file, if any left.  */
      if (offset < max_offset + 1 - LINESZ)
	{
	  enter_line_range (&main_subfile, offset, 0, start, end, 
			    &main_source_baseline);
	}
    }

  /* Process main file's line numbers.  */
  if (main_subfile.line_vector)
    {
      struct linetable *lineTb, *lv;

      lv = main_subfile.line_vector;

      /* Line numbers are not necessarily ordered. xlc compilation will
	 put static function to the end. */

      lineTb = arrange_linetable (lv);
      if (lv == lineTb)
	{
	  current_subfile->line_vector = (struct linetable *)
	    xrealloc (lv, (sizeof (struct linetable)
			   + lv->nitems * sizeof (struct linetable_entry)));
	}
      else
	{
	  free (lv);
	  current_subfile->line_vector = lineTb;
	}

      current_subfile->line_vector_length = 
	current_subfile->line_vector->nitems;
    }

  /* Now, process included files' line numbers.  */

  for (ii=0; ii < inclIndx; ++ii)
    {
      if ((inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */
	{
	  struct linetable *lineTb, *lv;

	  lv = (inclTable[ii].subfile)->line_vector;

	  /* Line numbers are not necessarily ordered. xlc compilation will
	     put static function to the end. */

	  lineTb = arrange_linetable (lv);

	  push_subfile ();

	  /* For the same include file, we might want to have more than one
	     subfile.  This happens if we have something like:

  		......
	        #include "foo.h"
		......
	 	#include "foo.h"
		......

	     while foo.h including code in it. (stupid but possible)
	     Since start_subfile() looks at the name and uses an
	     existing one if finds, we need to provide a fake name and
	     fool it.  */

#if 0
	  start_subfile (inclTable[ii].name, (char*)0);
#else
	  {
	    /* Pick a fake name that will produce the same results as this
	       one when passed to deduce_language_from_filename.  Kludge on
	       top of kludge.  */
	    char *fakename = strrchr (inclTable[ii].name, '.');
	    if (fakename == NULL)
	      fakename = " ?";
	    start_subfile (fakename, (char*)0);
	    free (current_subfile->name);
	  }
	  current_subfile->name = strdup (inclTable[ii].name);
#endif

	  if (lv == lineTb)
	    {
	      current_subfile->line_vector =
		(struct linetable *) xrealloc
		  (lv, (sizeof (struct linetable)
			+ lv->nitems * sizeof (struct linetable_entry)));

	    }
	  else
	    {
	      free (lv);
	      current_subfile->line_vector = lineTb;
	    }

	  current_subfile->line_vector_length = 
	    current_subfile->line_vector->nitems;
	  start_subfile (pop_subfile (), (char*)0);
	}
    }

 return_after_cleanup:

  /* We don't want to keep alloc/free'ing the global include file table.  */
  inclIndx = 0;

  /* Start with a fresh subfile structure for the next file.  */
  memset (&main_subfile, '\0', sizeof (struct subfile));
}

void
aix_process_linenos ()
{
  /* process line numbers and enter them into line vector */
  process_linenos (last_source_start_addr, cur_src_end_addr);
}


/* Enter a given range of lines into the line vector.
   can be called in the following two ways:
     enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine)  or
     enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)

   endoffset points to the last line table entry that we should pay
   attention to.  */

static void
enter_line_range (subfile, beginoffset, endoffset, startaddr, endaddr,
		  firstLine)
     struct subfile *subfile;
     unsigned   beginoffset, endoffset;	/* offsets to line table */
     CORE_ADDR  startaddr, endaddr;
     unsigned   *firstLine;
{
  unsigned int curoffset;
  CORE_ADDR addr;
  struct external_lineno ext_lnno;
  struct internal_lineno int_lnno;
  unsigned int limit_offset;
  bfd *abfd;

  if (endoffset == 0 && startaddr == 0 && endaddr == 0)
    return;
  curoffset = beginoffset;
  limit_offset =
    ((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
      ->max_lineno_offset;

  if (endoffset != 0)
    {
      if (endoffset >= limit_offset)
	{
	  static struct complaint msg =
	    {"Bad line table offset in C_EINCL directive", 0, 0};
	  complain (&msg);
	  return;
	}
      limit_offset = endoffset;
    }
  else
    limit_offset -= 1;
  abfd = this_symtab_psymtab->objfile->obfd;

  while (curoffset <= limit_offset)
    {
      bfd_seek (abfd, curoffset, SEEK_SET);
      bfd_read (&ext_lnno, sizeof (struct external_lineno), 1, abfd);
      bfd_coff_swap_lineno_in (abfd, &ext_lnno, &int_lnno);

      /* Find the address this line represents.  */
      addr = (int_lnno.l_lnno
	      ? int_lnno.l_addr.l_paddr
	      : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
      addr += ANOFFSET (this_symtab_psymtab->objfile->section_offsets,
			SECT_OFF_TEXT);

      if (addr < startaddr || (endaddr && addr >= endaddr))
	return;

      if (int_lnno.l_lnno == 0)
	{
	  *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
	  record_line (subfile, 0, addr);
	  --(*firstLine);
	}
      else
	record_line (subfile, *firstLine + int_lnno.l_lnno, addr);
      curoffset += LINESZ;
    }
}


/* Save the vital information for use when closing off the current file.
   NAME is the file name the symbols came from, START_ADDR is the first
   text address for the file, and SIZE is the number of bytes of text.  */

#define complete_symtab(name, start_addr) {	\
  last_source_file = savestring (name, strlen (name));	\
  last_source_start_addr = start_addr;			\
}


/* Refill the symbol table input buffer
   and set the variables that control fetching entries from it.
   Reports an error if no data available.
   This function can read past the end of the symbol table
   (into the string table) but this does no harm.  */

/* Reading symbol table has to be fast! Keep the followings as macros, rather
   than functions. */

#define	RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
{						\
  char *namestr;				\
  namestr = (NAME); \
  if (namestr[0] == '.') ++namestr; \
  prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
				       (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \
  misc_func_recorded = 1;					\
}


/* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
   nested. At any given time, a symbol can only be in one static block.
   This is the base address of current static block, zero if non exists. */
   
static int static_block_base = 0;

/* Section number for the current static block.  */

static int static_block_section = -1;

/* true if space for symbol name has been allocated. */

static int symname_alloced = 0;

/* Next symbol to read.  Pointer into raw seething symbol table.  */

static char *raw_symbol;

/* This is the function which stabsread.c calls to get symbol
   continuations.  */

static char *
xcoff_next_symbol_text (objfile)
     struct objfile *objfile;
{
  struct internal_syment symbol;
  static struct complaint msg =
    {"Unexpected symbol continuation", 0, 0};
  char *retval;
  /* FIXME: is this the same as the passed arg? */
  objfile = this_symtab_psymtab->objfile;

  bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
  if (symbol.n_zeroes)
    {
      complain (&msg);

      /* Return something which points to '\0' and hope the symbol reading
	 code does something reasonable.  */
      retval = "";
    }
  else if (symbol.n_sclass & 0x80)
    {
      retval =
	((struct coff_symfile_info *)objfile->sym_private)->debugsec
	  + symbol.n_offset;
      raw_symbol +=
	coff_data (objfile->obfd)->local_symesz;
      ++symnum;
    }
  else
    {
      complain (&msg);

      /* Return something which points to '\0' and hope the symbol reading
	 code does something reasonable.  */
      retval = "";
    }
  return retval;
}

/* Read symbols for a given partial symbol table.  */

static void
read_xcoff_symtab (pst)
     struct partial_symtab *pst;
{
  struct objfile *objfile = pst->objfile;
  bfd *abfd = objfile->obfd;
  char *raw_auxptr;		/* Pointer to first raw aux entry for sym */
  char *strtbl = ((struct coff_symfile_info *)objfile->sym_private)->strtbl;
  char *debugsec =
    ((struct coff_symfile_info *)objfile->sym_private)->debugsec;

  struct internal_syment symbol[1];
  union internal_auxent main_aux;
  struct coff_symbol cs[1];
  CORE_ADDR file_start_addr = 0;
  CORE_ADDR file_end_addr = 0;

  int next_file_symnum = -1;
  unsigned int max_symnum;
  int just_started = 1;
  int depth = 0;
  int fcn_start_addr = 0;

  struct coff_symbol fcn_stab_saved;

  /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
  union internal_auxent fcn_aux_saved;
  struct context_stack *new;

  char *filestring = " _start_ ";	/* Name of the current file. */

  char *last_csect_name;		/* last seen csect's name and value */
  CORE_ADDR last_csect_val;
  int last_csect_sec;

  this_symtab_psymtab = pst;

  /* Get the appropriate COFF "constants" related to the file we're
     handling. */
  local_symesz = coff_data (abfd)->local_symesz;

  last_source_file = NULL;
  last_csect_name = 0;
  last_csect_val = 0;

  start_stabs ();
  start_symtab (filestring, (char *)NULL, file_start_addr);
  record_debugformat ("XCOFF");
  symnum = ((struct symloc *)pst->read_symtab_private)->first_symnum;
  max_symnum =
    symnum + ((struct symloc *)pst->read_symtab_private)->numsyms;
  first_object_file_end = 0;

  raw_symbol =
    ((struct coff_symfile_info *) objfile->sym_private)->symtbl
      + symnum * local_symesz;

  while (symnum < max_symnum)
    {

      QUIT;			/* make this command interruptable.  */

      /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
      /* read one symbol into `cs' structure. After processing the
	 whole symbol table, only string table will be kept in memory,
	 symbol table and debug section of xcoff will be freed. Thus
	 we can mark symbols with names in string table as
	 `alloced'. */
      {
	int ii;

	/* Swap and align the symbol into a reasonable C structure.  */
	bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);

	cs->c_symnum = symnum;
	cs->c_naux = symbol->n_numaux;
	if (symbol->n_zeroes)
	  {
	    symname_alloced = 0;
	    /* We must use the original, unswapped, name here so the name field
	       pointed to by cs->c_name will persist throughout xcoffread.  If
	       we use the new field, it gets overwritten for each symbol.  */
	    cs->c_name = ((struct external_syment *)raw_symbol)->e.e_name;
	    /* If it's exactly E_SYMNMLEN characters long it isn't
	       '\0'-terminated.  */
	    if (cs->c_name[E_SYMNMLEN - 1] != '\0')
	      {
		char *p;
		p = obstack_alloc (&objfile->symbol_obstack, E_SYMNMLEN + 1);
		strncpy (p, cs->c_name, E_SYMNMLEN);
		p[E_SYMNMLEN] = '\0';
		cs->c_name = p;
		symname_alloced = 1;
	      }
	  }
	else if (symbol->n_sclass & 0x80)
	  {
	    cs->c_name = debugsec + symbol->n_offset;
	    symname_alloced = 0;
	  }
	else
	  {
	    /* in string table */
	    cs->c_name = strtbl + (int)symbol->n_offset;
	    symname_alloced = 1;
	  }
	cs->c_value = symbol->n_value;
	cs->c_sclass = symbol->n_sclass;
	cs->c_secnum = symbol->n_scnum;
	cs->c_type = (unsigned)symbol->n_type;

	raw_symbol += coff_data (abfd)->local_symesz;
	++symnum;

	/* Save addr of first aux entry.  */
	raw_auxptr = raw_symbol;

	/* Skip all the auxents associated with this symbol.  */
	for (ii = symbol->n_numaux; ii; --ii)
	  {
	    raw_symbol += coff_data (abfd)->local_auxesz;
	    ++symnum;
	  }
      }

      /* if symbol name starts with ".$" or "$", ignore it. */
      if (cs->c_name[0] == '$'
	  || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
	continue;

      if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
	{
	  if (last_source_file)
	    {
	      pst->symtab =
		end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT);
	      end_stabs ();
	    }

	  start_stabs ();
	  start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0);
	  record_debugformat ("XCOFF");
	  cur_src_end_addr = first_object_file_end;
	  /* done with all files, everything from here on is globals */
	}

      /* if explicitly specified as a function, treat is as one. */
      if (ISFCN(cs->c_type) && cs->c_sclass != C_TPDEF)
	{
	  bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
				0, cs->c_naux, &main_aux);
	  goto function_entry_point;
	}

      if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
	  && cs->c_naux == 1)
	{
	  /* Dealing with a symbol with a csect entry.  */

#define	CSECT(PP) ((PP)->x_csect)
#define	CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
#define	CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
#define	CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
#define	CSECT_SCLAS(PP) (CSECT(PP).x_smclas)

	  /* Convert the auxent to something we can access.  */
	  bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
				0, cs->c_naux, &main_aux);

	  switch (CSECT_SMTYP (&main_aux))
	    {

	    case XTY_ER:
	      /* Ignore all external references.  */
	      continue;

	    case XTY_SD:
	      /* A section description.  */
	      {
		switch (CSECT_SCLAS (&main_aux))
		  {

		  case XMC_PR:
		    {

		      /* A program csect is seen.  We have to allocate one
			 symbol table for each program csect.  Normally gdb
			 prefers one symtab for each source file.  In case
			 of AIX, one source file might include more than one
			 [PR] csect, and they don't have to be adjacent in
			 terms of the space they occupy in memory. Thus, one
			 single source file might get fragmented in the
			 memory and gdb's file start and end address
			 approach does not work!  GCC (and I think xlc) seem
			 to put all the code in the unnamed program csect.  */

		      if (last_csect_name)
			{
			  complete_symtab (filestring, file_start_addr);
			  cur_src_end_addr = file_end_addr;
			  end_symtab (file_end_addr, objfile, SECT_OFF_TEXT);
			  end_stabs ();
			  start_stabs ();
			  /* Give all csects for this source file the same
			     name.  */
			  start_symtab (filestring, NULL, (CORE_ADDR)0);
			  record_debugformat ("XCOFF");
			}

		      /* If this is the very first csect seen,
			 basically `__start'. */
		      if (just_started)
			{
			  first_object_file_end
			    = cs->c_value + CSECT_LEN (&main_aux);
			  just_started = 0;
			}

		      file_start_addr =
			cs->c_value + ANOFFSET (objfile->section_offsets,
						SECT_OFF_TEXT);
		      file_end_addr = file_start_addr + CSECT_LEN (&main_aux);

		      if (cs->c_name && cs->c_name[0] == '.')
			{
			  last_csect_name = cs->c_name;
			  last_csect_val = cs->c_value;
			  last_csect_sec = secnum_to_section (cs->c_secnum, objfile);
			}
		    }
		    continue;

		    /* All other symbols are put into the minimal symbol
		       table only.  */

		  case XMC_RW:
		    continue;

		  case XMC_TC0:
		    continue;

		  case XMC_TC:
		    continue;

		  default:
		    /* Ignore the symbol.  */
		    continue;
		  }
	      }
	      break;

	    case XTY_LD:

	      switch (CSECT_SCLAS (&main_aux))
		{
		case XMC_PR:
		  /* a function entry point. */
		function_entry_point:

		  fcn_start_addr = cs->c_value;

		  /* save the function header info, which will be used
		     when `.bf' is seen. */
		  fcn_cs_saved = *cs;
		  fcn_aux_saved = main_aux;
		  continue;

		case XMC_GL:
		  /* shared library function trampoline code entry point. */
		  continue;

		case XMC_DS:
		  /* The symbols often have the same names as debug symbols for
		     functions, and confuse lookup_symbol.  */
		  continue;

		default:
		  /* xlc puts each variable in a separate csect, so we get
		     an XTY_SD for each variable.  But gcc puts several
		     variables in a csect, so that each variable only gets
		     an XTY_LD. This will typically be XMC_RW; I suspect
		     XMC_RO and XMC_BS might be possible too.
		     These variables are put in the minimal symbol table
		     only.  */
		  continue;
		}
	      break;

	    case XTY_CM:
	      /* Common symbols are put into the minimal symbol table only.  */
	      continue;

	    default:
	      break;
	    }
	}

      switch (cs->c_sclass)
	{

	case C_FILE:

	  /* c_value field contains symnum of next .file entry in table
	     or symnum of first global after last .file. */

	  next_file_symnum = cs->c_value;

	  /* Complete symbol table for last object file containing
	     debugging information. */

	  /* Whether or not there was a csect in the previous file, we
	     have to call `end_stabs' and `start_stabs' to reset
	     type_vector, line_vector, etc. structures.  */

	  complete_symtab (filestring, file_start_addr);
	  cur_src_end_addr = file_end_addr;
	  end_symtab (file_end_addr, objfile, SECT_OFF_TEXT);
	  end_stabs ();

	  /* XCOFF, according to the AIX 3.2 documentation, puts the filename
	     in cs->c_name.  But xlc 1.3.0.2 has decided to do things the
	     standard COFF way and put it in the auxent.  We use the auxent if
	     the symbol is ".file" and an auxent exists, otherwise use the symbol
	     itself.  Simple enough.  */
	  if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
	    {
	      bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
				    0, cs->c_naux, &main_aux);
	      filestring = coff_getfilename (&main_aux, objfile);
	    }
	  else
	    filestring = cs->c_name;

	  start_stabs ();
	  start_symtab (filestring, (char *)NULL, (CORE_ADDR)0);
	  record_debugformat ("XCOFF");
	  last_csect_name = 0;

	  /* reset file start and end addresses. A compilation unit with no text
	     (only data) should have zero file boundaries. */
	  file_start_addr = file_end_addr = 0;
	  break;

	case C_FUN:
	  fcn_stab_saved = *cs;
	  break;

	case C_FCN:
	  if (STREQ (cs->c_name, ".bf"))
	    {
	      CORE_ADDR off = ANOFFSET (objfile->section_offsets,
					SECT_OFF_TEXT);
	      bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
				    0, cs->c_naux, &main_aux);

	      within_function = 1;

	      new = push_context (0, fcn_start_addr + off);

	      new->name = define_symbol 
		(fcn_cs_saved.c_value + off,
		 fcn_stab_saved.c_name, 0, 0, objfile);
	      if (new->name != NULL)
		SYMBOL_SECTION (new->name) = SECT_OFF_TEXT;
	    }
	  else if (STREQ (cs->c_name, ".ef"))
	    {

	      bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
				    0, cs->c_naux, &main_aux);

	      /* The value of .ef is the address of epilogue code;
		 not useful for gdb.  */
	      /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
		 contains number of lines to '}' */

	      if (context_stack_depth <= 0)
		{		/* We attempted to pop an empty context stack */
		  complain (&ef_complaint, cs->c_symnum);
		  within_function = 0;
		  break;
		}
	      new = pop_context ();
	      /* Stack must be empty now.  */
	      if (context_stack_depth > 0 || new == NULL)
		{
		  complain (&ef_complaint, cs->c_symnum);
		  within_function = 0;
		  break;
		}

	      finish_block (new->name, &local_symbols, new->old_blocks,
			    new->start_addr,
			    (fcn_cs_saved.c_value
			     + fcn_aux_saved.x_sym.x_misc.x_fsize
			     + ANOFFSET (objfile->section_offsets,
					 SECT_OFF_TEXT)),
			    objfile);
	      within_function = 0;
	    }
	  break;

	case C_BSTAT:
	  /* Begin static block.  */
	  {
	    struct internal_syment symbol;

	    read_symbol (&symbol, cs->c_value);
	    static_block_base = symbol.n_value;
	    static_block_section =
	      secnum_to_section (symbol.n_scnum, objfile);
	  }
	  break;

	case C_ESTAT:
	  /* End of static block.  */
	  static_block_base = 0;
	  static_block_section = -1;
	  break;

	case C_ARG:
	case C_REGPARM:
	case C_REG:
	case C_TPDEF:
	case C_STRTAG:
	case C_UNTAG:
	case C_ENTAG:
	  {
	    static struct complaint msg =
	      {"Unrecognized storage class %d.", 0, 0};
	    complain (&msg, cs->c_sclass);
	  }
	  break;

	case C_LABEL:
	case C_NULL:
	  /* Ignore these.  */
	  break;

	case C_HIDEXT:
	case C_STAT:
	  break;

	case C_BINCL:
	  /* beginning of include file */
	  /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
	     order. Thus, when wee see them, we might not know enough info
	     to process them. Thus, we'll be saving them into a table 
	     (inclTable) and postpone their processing. */

	  record_include_begin (cs);
	  break;

	case C_EINCL:
	  /* End of include file.  */
	  /* See the comment after case C_BINCL.  */
	  record_include_end (cs);
	  break;

	case C_BLOCK:
	  if (STREQ (cs->c_name, ".bb"))
	    {
	      depth++;
	      new = push_context (depth,
				  (cs->c_value
				   + ANOFFSET (objfile->section_offsets,
					       SECT_OFF_TEXT)));
	    }
	  else if (STREQ (cs->c_name, ".eb"))
	    {
	      if (context_stack_depth <= 0)
		{		/* We attempted to pop an empty context stack */
		  complain (&eb_complaint, cs->c_symnum);
		  break;
		}
	      new = pop_context ();
	      if (depth-- != new->depth)
		{
		  complain (&eb_complaint, cs->c_symnum);
		  break;
		}
	      if (local_symbols && context_stack_depth > 0)
		{
		  /* Make a block for the local symbols within.  */
		  finish_block (new->name, &local_symbols, new->old_blocks,
				new->start_addr,
				(cs->c_value
				 + ANOFFSET (objfile->section_offsets,
					     SECT_OFF_TEXT)),
				objfile);
		}
	      local_symbols = new->locals;
	    }
	  break;

	default:
	  process_xcoff_symbol (cs, objfile);
	  break;
	}
    }

  if (last_source_file)
    {
      struct symtab *s;

      complete_symtab (filestring, file_start_addr);
      cur_src_end_addr = file_end_addr;
      s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT);
      /* When reading symbols for the last C_FILE of the objfile, try
         to make sure that we set pst->symtab to the symtab for the
         file, not to the _globals_ symtab.  I'm not sure whether this
         actually works right or when/if it comes up.  */
      if (pst->symtab == NULL)
	pst->symtab = s;
      end_stabs ();
    }
}

#define	SYMBOL_DUP(SYMBOL1, SYMBOL2)	\
  (SYMBOL2) = (struct symbol *)		\
  	obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
  *(SYMBOL2) = *(SYMBOL1);
  
 
#define	SYMNAME_ALLOC(NAME, ALLOCED)	\
  (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->symbol_obstack);


static struct type *func_symbol_type;
static struct type *var_symbol_type;

/* process one xcoff symbol. */

static struct symbol *
process_xcoff_symbol (cs, objfile)
  register struct coff_symbol *cs;
  struct objfile *objfile;
{
  struct symbol onesymbol;
  register struct symbol *sym = &onesymbol;
  struct symbol *sym2 = NULL;
  char *name, *pp;

  int sec;
  CORE_ADDR off;

  if (cs->c_secnum < 0)
    {
      /* The value is a register number, offset within a frame, etc.,
	 and does not get relocated.  */
      off = 0;
      sec = -1;
    }
  else
    {
      sec = secnum_to_section (cs->c_secnum, objfile);
      off = ANOFFSET (objfile->section_offsets, sec);
    }

  name = cs->c_name;
  if (name[0] == '.')
    ++name;

  memset (sym, '\0', sizeof (struct symbol));

  /* default assumptions */
  SYMBOL_VALUE (sym) = cs->c_value + off;
  SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
  SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);

  if (ISFCN (cs->c_type))
    {
      /* At this point, we don't know the type of the function.  This
	 will be patched with the type from its stab entry later on in
	 patch_block_stabs (), unless the file was compiled without -g.  */

      SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
      SYMBOL_TYPE (sym) = func_symbol_type;

      SYMBOL_CLASS (sym) = LOC_BLOCK;
      SYMBOL_DUP (sym, sym2);

      if (cs->c_sclass == C_EXT)
	add_symbol_to_list (sym2, &global_symbols);
      else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
	add_symbol_to_list (sym2, &file_symbols);
    }
  else
    {
      /* In case we can't figure out the type, provide default. */
      SYMBOL_TYPE (sym) = var_symbol_type;

      switch (cs->c_sclass)
	{
#if 0
	/* The values of functions and global symbols are now resolved
	   via the global_sym_chain in stabsread.c.  */
	case C_FUN:
	  if (fcn_cs_saved.c_sclass == C_EXT)
	    add_stab_to_list (name, &global_stabs);
	  else
	    add_stab_to_list (name, &file_stabs);
	  break;

	case C_GSYM:
	  add_stab_to_list (name, &global_stabs);
	  break;
#endif

	case C_BCOMM:
	  common_block_start (cs->c_name, objfile);
	  break;

	case C_ECOMM:
	  common_block_end (objfile);
	  break;

	default:
	  complain (&storclass_complaint, cs->c_sclass);
	  /* FALLTHROUGH */

	case C_DECL:
	case C_PSYM:
	case C_RPSYM:
	case C_ECOML:
	case C_LSYM:
	case C_RSYM:
	case C_GSYM:

	  {
	    sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
	    if (sym != NULL)
	      {
		SYMBOL_SECTION (sym) = sec;
	      }
	    return sym;
	  }

	case C_STSYM:

	  /* For xlc (not GCC), the 'V' symbol descriptor is used for
	     all statics and we need to distinguish file-scope versus
	     function-scope using within_function.  We do this by
	     changing the string we pass to define_symbol to use 'S'
	     where we need to, which is not necessarily super-clean,
	     but seems workable enough.  */

	  if (*name == ':' || (pp = (char *) strchr(name, ':')) == NULL)
	    return NULL;

	  ++pp;
	  if (*pp == 'V' && !within_function)
	    *pp = 'S';
	  sym = define_symbol ((cs->c_value
				+ ANOFFSET (objfile->section_offsets,
					    static_block_section)),
			       cs->c_name, 0, 0, objfile);
	  if (sym != NULL)
	    {
	      SYMBOL_VALUE (sym) += static_block_base;
	      SYMBOL_SECTION (sym) = static_block_section;
	    }
	  return sym;

	}
    }
  return sym2;
}

/* Extract the file name from the aux entry of a C_FILE symbol.
   Result is in static storage and is only good for temporary use.  */

static char *
coff_getfilename (aux_entry, objfile)
     union internal_auxent *aux_entry;
     struct objfile *objfile;
{
  static char buffer[BUFSIZ];

  if (aux_entry->x_file.x_n.x_zeroes == 0)
    strcpy (buffer,
	    ((struct coff_symfile_info *)objfile->sym_private)->strtbl
	    + aux_entry->x_file.x_n.x_offset);
  else
    {
      strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
      buffer[FILNMLEN] = '\0';
    }
  return (buffer);
}

/* Set *SYMBOL to symbol number symno in symtbl.  */
static void
read_symbol (symbol, symno)
     struct internal_syment *symbol;
     int symno;
{
  int nsyms =
    ((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
      ->symtbl_num_syms;
  char *stbl = 
    ((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
      ->symtbl;
  if (symno < 0 || symno >= nsyms)
    {
      static struct complaint msg =
	{"Invalid symbol offset", 0, 0};
      complain (&msg);
      symbol->n_value = 0;
      symbol->n_scnum = -1;
      return;
    }
  bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd,
			stbl + (symno*local_symesz),
			symbol);
}
  
/* Get value corresponding to symbol number symno in symtbl.  */

static int
read_symbol_nvalue (symno)
     int symno;
{
  struct internal_syment symbol[1];

  read_symbol (symbol, symno);
  return symbol->n_value;  
}


/* Find the address of the function corresponding to symno, where
   symno is the symbol pointed to by the linetable.  */

static int
read_symbol_lineno (symno)
     int symno;
{
  int nsyms =
    ((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
      ->symtbl_num_syms;
  char *stbl = 
    ((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
      ->symtbl;
  struct internal_syment symbol[1];
  union internal_auxent main_aux[1];

  if (symno < 0)
    {
      complain (&bf_notfound_complaint);
      return 0;
    }

  /* Note that just searching for a short distance (e.g. 50 symbols)
     is not enough, at least in the following case.

     .extern foo
     [many .stabx entries]
     [a few functions, referring to foo]
     .globl foo
     .bf

     What happens here is that the assembler moves the .stabx entries
     to right before the ".bf" for foo, but the symbol for "foo" is before
     all the stabx entries.  See PR gdb/2222.  */

  /* Maintaining a table of .bf entries might be preferable to this search.
     If I understand things correctly it would need to be done only for
     the duration of a single psymtab to symtab conversion.  */
  while (symno < nsyms)
    {
      bfd_coff_swap_sym_in (symfile_bfd,
			    stbl + (symno * local_symesz), symbol);
      if (symbol->n_sclass == C_FCN && STREQ (symbol->n_name, ".bf"))
	goto gotit;
      symno += symbol->n_numaux + 1;
    }

  complain (&bf_notfound_complaint);
  return 0;

gotit:
  /* take aux entry and return its lineno */
  symno++;
  bfd_coff_swap_aux_in (this_symtab_psymtab->objfile->obfd,
			stbl + symno * local_symesz,
			symbol->n_type, symbol->n_sclass,
			0, symbol->n_numaux, main_aux);

  return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
}

/* Support for line number handling */

/* This function is called for every section; it finds the outer limits
 * of the line table (minimum and maximum file offset) so that the
 * mainline code can read the whole thing for efficiency.
 */
static void
find_linenos (abfd, asect, vpinfo)
     bfd *abfd;
     sec_ptr asect;
     PTR vpinfo; 
{
  struct coff_symfile_info *info;
  int size, count;
  file_ptr offset, maxoff;

  count = asect->lineno_count;

  if (!STREQ (asect->name, ".text") || count == 0)
    return;

  size = count * coff_data (abfd)->local_linesz;
  info = (struct coff_symfile_info *)vpinfo;
  offset = asect->line_filepos;
  maxoff = offset + size;

  if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
    info->min_lineno_offset = offset;

  if (maxoff > info->max_lineno_offset)
    info->max_lineno_offset = maxoff;
}

static void xcoff_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));

static void
xcoff_psymtab_to_symtab_1 (pst)
     struct partial_symtab *pst;
{
  struct cleanup *old_chain;
  int i;
  
  if (!pst)
    return;

  if (pst->readin)
    {
      fprintf_unfiltered
	(gdb_stderr, "Psymtab for %s already read in.  Shouldn't happen.\n",
	 pst->filename);
      return;
    }

  /* Read in all partial symtabs on which this one is dependent */
  for (i = 0; i < pst->number_of_dependencies; i++)
    if (!pst->dependencies[i]->readin)
      {
	/* Inform about additional files that need to be read in.  */
	if (info_verbose)
	  {
	    fputs_filtered (" ", gdb_stdout);
	    wrap_here ("");
	    fputs_filtered ("and ", gdb_stdout);
	    wrap_here ("");
	    printf_filtered ("%s...", pst->dependencies[i]->filename);
	    wrap_here ("");		/* Flush output */
	    gdb_flush (gdb_stdout);
	  }
	xcoff_psymtab_to_symtab_1 (pst->dependencies[i]);
      }

  if (((struct symloc *)pst->read_symtab_private)->numsyms != 0)
    {
      /* Init stuff necessary for reading in symbols.  */
      stabsread_init ();
      buildsym_init ();
      old_chain = make_cleanup ((make_cleanup_func) really_free_pendings, 0);

      read_xcoff_symtab (pst);
      sort_symtab_syms (pst->symtab);

      do_cleanups (old_chain);
    }

  pst->readin = 1;
}

static void xcoff_psymtab_to_symtab PARAMS ((struct partial_symtab *));

/* Read in all of the symbols for a given psymtab for real.
   Be verbose about it if the user wants that.  */

static void
xcoff_psymtab_to_symtab (pst)
     struct partial_symtab *pst;
{
  bfd *sym_bfd;

  if (!pst)
    return;

  if (pst->readin)
    {
      fprintf_unfiltered
	(gdb_stderr, "Psymtab for %s already read in.  Shouldn't happen.\n",
	 pst->filename);
      return;
    }

  if (((struct symloc *)pst->read_symtab_private)->numsyms != 0
      || pst->number_of_dependencies)
    {
      /* Print the message now, before reading the string table,
	 to avoid disconcerting pauses.  */
      if (info_verbose)
	{
	  printf_filtered ("Reading in symbols for %s...", pst->filename);
	  gdb_flush (gdb_stdout);
	}

      sym_bfd = pst->objfile->obfd;

      next_symbol_text_func = xcoff_next_symbol_text;

      xcoff_psymtab_to_symtab_1 (pst);

      /* Match with global symbols.  This only needs to be done once,
         after all of the symtabs and dependencies have been read in.   */
      scan_file_globals (pst->objfile);

      /* Finish up the debug error message.  */
      if (info_verbose)
	printf_filtered ("done.\n");
    }
}

static void
xcoff_new_init (objfile)
     struct objfile *objfile;
{
  stabsread_new_init ();
  buildsym_new_init ();
}

/* Do initialization in preparation for reading symbols from OBJFILE.
 
   We will only be called if this is an XCOFF or XCOFF-like file.
   BFD handles figuring out the format of the file, and code in symfile.c
   uses BFD's determination to vector to us.  */

static void
xcoff_symfile_init (objfile)
     struct objfile *objfile;
{
  /* Allocate struct to keep track of the symfile */
  objfile -> sym_private = xmmalloc (objfile -> md,
				     sizeof (struct coff_symfile_info));

  /* XCOFF objects may be reordered, so set OBJF_REORDERED.  If we
     find this causes a significant slowdown in gdb then we could
     set it in the debug symbol readers only when necessary.  */
  objfile->flags |= OBJF_REORDERED;

  init_entry_point_info (objfile);
}

/* Perform any local cleanups required when we are done with a particular
   objfile.  I.E, we are in the process of discarding all symbol information
   for an objfile, freeing up all memory held for it, and unlinking the
   objfile struct from the global list of known objfiles. */

static void
xcoff_symfile_finish (objfile)
     struct objfile *objfile;
{
  if (objfile -> sym_private != NULL)
    {
      mfree (objfile -> md, objfile -> sym_private);
    }

  /* Start with a fresh include table for the next objfile.  */
  if (inclTable)
    {
      free (inclTable);
      inclTable = NULL;
    }
  inclIndx = inclLength = inclDepth = 0;
}


static void
init_stringtab (abfd, offset, objfile)
     bfd *abfd;
     file_ptr offset;
     struct objfile *objfile;
{
  long length;
  int val;
  unsigned char lengthbuf[4];
  char *strtbl;

  ((struct coff_symfile_info *)objfile->sym_private)->strtbl = NULL;

  if (bfd_seek (abfd, offset, SEEK_SET) < 0)
    error ("cannot seek to string table in %s: %s",
	   bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));

  val = bfd_read ((char *)lengthbuf, 1, sizeof lengthbuf, abfd);
  length = bfd_h_get_32 (abfd, lengthbuf);

  /* If no string table is needed, then the file may end immediately
     after the symbols.  Just return with `strtbl' set to NULL.  */

  if (val != sizeof lengthbuf || length < sizeof lengthbuf)
    return;

  /* Allocate string table from symbol_obstack. We will need this table
     as long as we have its symbol table around. */

  strtbl = (char *) obstack_alloc (&objfile->symbol_obstack, length);
  ((struct coff_symfile_info *)objfile->sym_private)->strtbl = strtbl;

  /* Copy length buffer, the first byte is usually zero and is
     used for stabs with a name length of zero.  */
  memcpy (strtbl, lengthbuf, sizeof lengthbuf);
  if (length == sizeof lengthbuf)
    return;

  val = bfd_read (strtbl + sizeof lengthbuf, 1, length - sizeof lengthbuf,
		  abfd);

  if (val != length - sizeof lengthbuf)
    error ("cannot read string table from %s: %s",
	   bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
  if (strtbl[length - 1] != '\0')
    error ("bad symbol file: string table does not end with null character");

  return;
}

/* If we have not yet seen a function for this psymtab, this is 0.  If we
   have seen one, it is the offset in the line numbers of the line numbers
   for the psymtab.  */
static unsigned int first_fun_line_offset;

static struct partial_symtab *xcoff_start_psymtab
  PARAMS ((struct objfile *, struct section_offsets *, char *, int,
	   struct partial_symbol **, struct partial_symbol **));

/* Allocate and partially fill a partial symtab.  It will be
   completely filled at the end of the symbol list.

   SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
   is the address relative to which its symbols are (incremental) or 0
   (normal). */

static struct partial_symtab *
xcoff_start_psymtab (objfile, section_offsets,
		     filename, first_symnum, global_syms, static_syms)
     struct objfile *objfile;
     struct section_offsets *section_offsets;
     char *filename;
     int first_symnum;
     struct partial_symbol **global_syms;
     struct partial_symbol **static_syms;
{
  struct partial_symtab *result =
    start_psymtab_common (objfile, section_offsets,
			  filename,
			  /* We fill in textlow later.  */
			  0,
			  global_syms, static_syms);

  result->read_symtab_private = (char *)
    obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
  ((struct symloc *)result->read_symtab_private)->first_symnum = first_symnum;
  result->read_symtab = xcoff_psymtab_to_symtab;

  /* Deduce the source language from the filename for this psymtab. */
  psymtab_language = deduce_language_from_filename (filename);

  return result;
}

static struct partial_symtab *xcoff_end_psymtab
  PARAMS ((struct partial_symtab *, char **, int, int,
	   struct partial_symtab **, int, int));

/* Close off the current usage of PST.  
   Returns PST, or NULL if the partial symtab was empty and thrown away.

   CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).

   INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
   are the information for includes and dependencies.  */

static struct partial_symtab *
xcoff_end_psymtab (pst, include_list, num_includes, capping_symbol_number,
		   dependency_list, number_dependencies, textlow_not_set)
     struct partial_symtab *pst;
     char **include_list;
     int num_includes;
     int capping_symbol_number;
     struct partial_symtab **dependency_list;
     int number_dependencies;
     int textlow_not_set;
{
  int i;
  struct objfile *objfile = pst -> objfile;

  if (capping_symbol_number != -1)
    ((struct symloc *)pst->read_symtab_private)->numsyms =
      capping_symbol_number
	- ((struct symloc *)pst->read_symtab_private)->first_symnum;
  ((struct symloc *)pst->read_symtab_private)->lineno_off =
    first_fun_line_offset;
  first_fun_line_offset = 0;
  pst->n_global_syms =
    objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
  pst->n_static_syms =
    objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);

  pst->number_of_dependencies = number_dependencies;
  if (number_dependencies)
    {
      pst->dependencies = (struct partial_symtab **)
	obstack_alloc (&objfile->psymbol_obstack,
		       number_dependencies * sizeof (struct partial_symtab *));
      memcpy (pst->dependencies, dependency_list,
	     number_dependencies * sizeof (struct partial_symtab *));
    }
  else
    pst->dependencies = 0;

  for (i = 0; i < num_includes; i++)
    {
      struct partial_symtab *subpst =
	allocate_psymtab (include_list[i], objfile);

      subpst->section_offsets = pst->section_offsets;
      subpst->read_symtab_private =
	  (char *) obstack_alloc (&objfile->psymbol_obstack,
				  sizeof (struct symloc));
      ((struct symloc *)subpst->read_symtab_private)->first_symnum = 0;
      ((struct symloc *)subpst->read_symtab_private)->numsyms = 0;
      subpst->textlow = 0;
      subpst->texthigh = 0;

      /* We could save slight bits of space by only making one of these,
	 shared by the entire set of include files.  FIXME-someday.  */
      subpst->dependencies = (struct partial_symtab **)
	obstack_alloc (&objfile->psymbol_obstack,
		       sizeof (struct partial_symtab *));
      subpst->dependencies[0] = pst;
      subpst->number_of_dependencies = 1;

      subpst->globals_offset =
	subpst->n_global_syms =
	  subpst->statics_offset =
	    subpst->n_static_syms = 0;

      subpst->readin = 0;
      subpst->symtab = 0;
      subpst->read_symtab = pst->read_symtab;
    }

  sort_pst_symbols (pst);

  /* If there is already a psymtab or symtab for a file of this name,
     remove it.  (If there is a symtab, more drastic things also
     happen.)  This happens in VxWorks.  */
  free_named_symtabs (pst->filename);

  if (num_includes == 0
      && number_dependencies == 0
      && pst->n_global_syms == 0
      && pst->n_static_syms == 0)
    {
      /* Throw away this psymtab, it's empty.  We can't deallocate it, since
	 it is on the obstack, but we can forget to chain it on the list.  */
      /* Empty psymtabs happen as a result of header files which don't have
	 any symbols in them.  There can be a lot of them.  */

      discard_psymtab (pst);

      /* Indicate that psymtab was thrown away.  */
      pst = (struct partial_symtab *)NULL;
    }
  return pst;
}

static void swap_sym PARAMS ((struct internal_syment *,
			      union internal_auxent *, char **, char **,
			      unsigned int *,
			      struct objfile *));

/* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
   *SYMBOL, the first auxent in *AUX.  Advance *RAW and *SYMNUMP over
   the symbol and its auxents.  */

static void
swap_sym (symbol, aux, name, raw, symnump, objfile)
     struct internal_syment *symbol;
     union internal_auxent *aux;
     char **name;
     char **raw;
     unsigned int *symnump;
     struct objfile *objfile;
{
  bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
  if (symbol->n_zeroes)
    {
      /* If it's exactly E_SYMNMLEN characters long it isn't
	 '\0'-terminated.  */
      if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
	{
	  /* FIXME: wastes memory for symbols which we don't end up putting
	     into the minimal symbols.  */
	  char *p;
	  p = obstack_alloc (&objfile->psymbol_obstack, E_SYMNMLEN + 1);
	  strncpy (p, symbol->n_name, E_SYMNMLEN);
	  p[E_SYMNMLEN] = '\0';
	  *name = p;
	}
      else
	/* Point to the unswapped name as that persists as long as the
	   objfile does.  */
	*name = ((struct external_syment *)*raw)->e.e_name;
    }
  else if (symbol->n_sclass & 0x80)
    {
      *name = ((struct coff_symfile_info *)objfile->sym_private)->debugsec
	+ symbol->n_offset;
    }
  else
    {
      *name = ((struct coff_symfile_info *)objfile->sym_private)->strtbl
	+ symbol->n_offset;
    }
  ++*symnump;
  *raw += coff_data (objfile->obfd)->local_symesz;
  if (symbol->n_numaux > 0)
    {
      bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
			    symbol->n_sclass, 0, symbol->n_numaux, aux);

      *symnump += symbol->n_numaux;
      *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
    }
}

static void
scan_xcoff_symtab (section_offsets, objfile)
     struct section_offsets *section_offsets;
     struct objfile *objfile;
{
  CORE_ADDR toc_offset = 0;		/* toc offset value in data section. */
  char *filestring = NULL;

  char *namestring;
  int past_first_source_file = 0;
  bfd *abfd;
  asection *bfd_sect;
  unsigned int nsyms;

  /* Current partial symtab */
  struct partial_symtab *pst;

  /* List of current psymtab's include files */
  char **psymtab_include_list;
  int includes_allocated;
  int includes_used;

  /* Index within current psymtab dependency list */
  struct partial_symtab **dependency_list;
  int dependencies_used, dependencies_allocated;

  char *sraw_symbol;
  struct internal_syment symbol;
  union internal_auxent main_aux;
  unsigned int ssymnum;

  char *last_csect_name = NULL;		/* last seen csect's name and value */
  CORE_ADDR last_csect_val = 0;
  int last_csect_sec = 0;
  int  misc_func_recorded = 0;		/* true if any misc. function */
  int textlow_not_set = 1;

  pst = (struct partial_symtab *) 0;

  includes_allocated = 30;
  includes_used = 0;
  psymtab_include_list = (char **) alloca (includes_allocated *
					   sizeof (char *));

  dependencies_allocated = 30;
  dependencies_used = 0;
  dependency_list =
    (struct partial_symtab **) alloca (dependencies_allocated *
				       sizeof (struct partial_symtab *));

  last_source_file = NULL;

  abfd = objfile->obfd;

  sraw_symbol = ((struct coff_symfile_info *)objfile->sym_private)->symtbl;
  nsyms = ((struct coff_symfile_info *)objfile->sym_private)->symtbl_num_syms;
  ssymnum = 0;
  while (ssymnum < nsyms)
    {
      int sclass = ((struct external_syment *)sraw_symbol)->e_sclass[0] & 0xff;
      /* This is the type we pass to partial-stab.h.  A less kludgy solution
	 would be to break out partial-stab.h into its various parts--shuffle
	 off the DBXREAD_ONLY stuff to dbxread.c, and make separate
	 pstab-norm.h (for most types), pstab-sol.h (for N_SOL), etc.  */
      int stype;

      QUIT;

      switch (sclass)
	{
	case C_EXT:
	case C_HIDEXT:
	  {
	    /* The CSECT auxent--always the last auxent.  */
	    union internal_auxent csect_aux;
	    unsigned int symnum_before = ssymnum;

	    swap_sym (&symbol, &main_aux, &namestring, &sraw_symbol,
		      &ssymnum, objfile);
	    if (symbol.n_numaux > 1)
	      {
		bfd_coff_swap_aux_in
		  (objfile->obfd,
		   sraw_symbol - coff_data(abfd)->local_symesz,
		   symbol.n_type,
		   symbol.n_sclass,
		   symbol.n_numaux - 1,
		   symbol.n_numaux,
		   &csect_aux);
	      }
	    else
	      csect_aux = main_aux;

	    /* If symbol name starts with ".$" or "$", ignore it.  */
	    if (namestring[0] == '$'
		|| (namestring[0] == '.' && namestring[1] == '$'))
	      break;

	    switch (csect_aux.x_csect.x_smtyp & 0x7)
	      {
	      case XTY_SD:
		switch (csect_aux.x_csect.x_smclas)
		  {
		  case XMC_PR:
		    if (last_csect_name)
		      {
			/* If no misc. function recorded in the last
			   seen csect, enter it as a function. This
			   will take care of functions like strcmp()
			   compiled by xlc.  */

			if (!misc_func_recorded)
			  {
			    RECORD_MINIMAL_SYMBOL
			      (last_csect_name, last_csect_val,
			       mst_text, last_csect_sec,
			       objfile);
			  }

			if (pst != NULL)
			  {
			    /* We have to allocate one psymtab for
			       each program csect, because their text
			       sections need not be adjacent.  */
			    xcoff_end_psymtab
			      (pst, psymtab_include_list, includes_used,
			       symnum_before, dependency_list,
			       dependencies_used, textlow_not_set);
			    includes_used = 0;
			    dependencies_used = 0;
			    /* Give all psymtabs for this source file the same
			       name.  */
			    pst = xcoff_start_psymtab
			      (objfile, section_offsets,
			       filestring,
			       symnum_before,
			       objfile->global_psymbols.next,
			       objfile->static_psymbols.next);
			  }
		      }
		    if (namestring && namestring[0] == '.')
		      {
			last_csect_name = namestring;
			last_csect_val = symbol.n_value;
			last_csect_sec =
			  secnum_to_section (symbol.n_scnum, objfile);
		      }
		    if (pst != NULL)
		      {
			CORE_ADDR highval =
			  symbol.n_value + csect_aux.x_csect.x_scnlen.l;
			if (highval > pst->texthigh)
			  pst->texthigh = highval;
			if (pst->textlow == 0 || symbol.n_value < pst->textlow)
			  pst->textlow = symbol.n_value;
		      }
		    misc_func_recorded = 0;
		    break;

		  case XMC_RW:
		    /* Data variables are recorded in the minimal symbol
		       table, except for section symbols.  */
		    if (*namestring != '.')
		      prim_record_minimal_symbol_and_info
			(namestring, symbol.n_value,
			 sclass == C_HIDEXT ? mst_file_data : mst_data,
			 NULL, secnum_to_section (symbol.n_scnum, objfile),
			 NULL, objfile);
		    break;

		  case XMC_TC0:
		    if (toc_offset)
		      warning ("More than one XMC_TC0 symbol found.");
		    toc_offset = symbol.n_value;

		    /* Make TOC offset relative to start address of section.  */
		    bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
		    if (bfd_sect)
		      toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
		    break;

		  case XMC_TC:
		    /* These symbols tell us where the TOC entry for a
		       variable is, not the variable itself.  */
		    break;

		  default:
		    break;
		  }
		break;

	      case XTY_LD:
		switch (csect_aux.x_csect.x_smclas)
		  {
		  case XMC_PR:
		    /* A function entry point.  */

		    if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
		      first_fun_line_offset =
			main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
		    RECORD_MINIMAL_SYMBOL
		      (namestring, symbol.n_value,
		       sclass == C_HIDEXT ? mst_file_text : mst_text,
		       secnum_to_section (symbol.n_scnum, objfile),
		       objfile);
		    break;

		  case XMC_GL:
		    /* shared library function trampoline code entry
		       point. */

		    /* record trampoline code entries as
		       mst_solib_trampoline symbol.  When we lookup mst
		       symbols, we will choose mst_text over
		       mst_solib_trampoline. */
		    RECORD_MINIMAL_SYMBOL
		      (namestring, symbol.n_value,
		       mst_solib_trampoline,
		       secnum_to_section (symbol.n_scnum, objfile),
		       objfile);
		    break;

		  case XMC_DS:
		    /* The symbols often have the same names as
		       debug symbols for functions, and confuse
		       lookup_symbol.  */
		    break;

		  default:

		    /* xlc puts each variable in a separate csect,
		       so we get an XTY_SD for each variable.  But
		       gcc puts several variables in a csect, so
		       that each variable only gets an XTY_LD.  We
		       still need to record them.  This will
		       typically be XMC_RW; I suspect XMC_RO and
		       XMC_BS might be possible too.  */
		    if (*namestring != '.')
		      prim_record_minimal_symbol_and_info
			(namestring, symbol.n_value,
			 sclass == C_HIDEXT ? mst_file_data : mst_data,
			 NULL, secnum_to_section (symbol.n_scnum, objfile),
			 NULL, objfile);
		    break;
		  }
		break;

	      case XTY_CM:
		switch (csect_aux.x_csect.x_smclas)
		  {
		  case XMC_RW:
		  case XMC_BS:
		    /* Common variables are recorded in the minimal symbol
		       table, except for section symbols.  */
		    if (*namestring != '.')
		      prim_record_minimal_symbol_and_info
			(namestring, symbol.n_value,
			 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
			 NULL, secnum_to_section (symbol.n_scnum, objfile),
			 NULL, objfile);
		    break;
		  }
		break;

	      default:
		break;
	      }
	  }
	  break;
	case C_FILE:
	  {
	    unsigned int symnum_before;

	    symnum_before = ssymnum;
	    swap_sym (&symbol, &main_aux, &namestring, &sraw_symbol,
		      &ssymnum, objfile);

	    /* See if the last csect needs to be recorded.  */

	    if (last_csect_name && !misc_func_recorded)
	      {

		/* If no misc. function recorded in the last seen csect, enter
		   it as a function.  This will take care of functions like
		   strcmp() compiled by xlc.  */

		RECORD_MINIMAL_SYMBOL
		  (last_csect_name, last_csect_val,
		   mst_text, last_csect_sec, objfile);
	      }

	    if (pst)
	      {
		xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
				   symnum_before, dependency_list,
				   dependencies_used, textlow_not_set);
		includes_used = 0;
		dependencies_used = 0;
	      }
	    first_fun_line_offset = 0;

	    /* XCOFF, according to the AIX 3.2 documentation, puts the
	       filename in cs->c_name.  But xlc 1.3.0.2 has decided to
	       do things the standard COFF way and put it in the auxent.
	       We use the auxent if the symbol is ".file" and an auxent
	       exists, otherwise use the symbol itself.  */
	    if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
	      {
		filestring = coff_getfilename (&main_aux, objfile);
	      }
	    else
	      filestring = namestring;

	    pst = xcoff_start_psymtab (objfile, section_offsets,
				       filestring,
				       symnum_before,
				       objfile->global_psymbols.next,
				       objfile->static_psymbols.next);
	    last_csect_name = NULL;
	  }
	  break;

	default:
	  {
	    static struct complaint msg =
	      {"Storage class %d not recognized during scan", 0, 0};
	    complain (&msg, sclass);
	  }
	  /* FALLTHROUGH */

	  /* C_FCN is .bf and .ef symbols.  I think it is sufficient
	     to handle only the C_FUN and C_EXT.  */
	case C_FCN:

	case C_BSTAT:
	case C_ESTAT:
	case C_ARG:
	case C_REGPARM:
	case C_REG:
	case C_TPDEF:
	case C_STRTAG:
	case C_UNTAG:
	case C_ENTAG:
	case C_LABEL:
	case C_NULL:

	  /* C_EINCL means we are switching back to the main file.  But there
	     is no reason to care; the only thing we want to know about
	     includes is the names of all the included (.h) files.  */
	case C_EINCL:

	case C_BLOCK:

	  /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
	     used instead.  */
	case C_STAT:

	  /* I don't think the name of the common block (as opposed to the
	     variables within it) is something which is user visible
	     currently.  */
	case C_BCOMM:
	case C_ECOMM:

	case C_PSYM:
	case C_RPSYM:

	  /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
	     so C_LSYM would appear to be only for locals.  */
	case C_LSYM:

	case C_AUTO:
	case C_RSYM:
	  {
	    /* We probably could save a few instructions by assuming that
	       C_LSYM, C_PSYM, etc., never have auxents.  */
	    int naux1 =
	      ((struct external_syment *)sraw_symbol)->e_numaux[0] + 1;
	    ssymnum += naux1;
	    sraw_symbol += sizeof (struct external_syment) * naux1;
	  }
	  break;

	case C_BINCL:
	  stype = N_SOL;
	  goto pstab;

	case C_FUN:
	  /* The value of the C_FUN is not the address of the function (it
	     appears to be the address before linking), but as long as it
	     is smaller than the actual address, then find_pc_partial_function
	     will use the minimal symbols instead.  I hope.  */

	case C_GSYM:
	case C_ECOML:
	case C_DECL:
	case C_STSYM:
	  stype = N_LSYM;
	pstab:;
	  swap_sym (&symbol, &main_aux, &namestring, &sraw_symbol,
		    &ssymnum, objfile);
#define CUR_SYMBOL_TYPE stype
#define CUR_SYMBOL_VALUE symbol.n_value

/* START_PSYMTAB and END_PSYMTAB are never used, because they are only
   called from DBXREAD_ONLY or N_SO code.  Likewise for the symnum
   variable.  */
#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms) 0
#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
  do {} while (0)
/* We have already set the namestring.  */
#define SET_NAMESTRING() /* */

#include "partial-stab.h"
	}
    }

  if (pst)
    {
      xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
			 ssymnum, dependency_list,
			 dependencies_used, textlow_not_set);
    }

  /* Record the toc offset value of this symbol table into objfile structure.
     If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
     this information would be file auxiliary header. */

  ((struct coff_symfile_info *) objfile->sym_private)->toc_offset = toc_offset;
}

/* Return the toc offset value for a given objfile.  */

CORE_ADDR
get_toc_offset (objfile)
     struct objfile *objfile;
{
  if (objfile)
    return ((struct coff_symfile_info *) objfile->sym_private)->toc_offset;
  return 0;
}

/* Scan and build partial symbols for a symbol file.
   We have been initialized by a call to dbx_symfile_init, which 
   put all the relevant info into a "struct dbx_symfile_info",
   hung off the objfile structure.

   SECTION_OFFSETS contains offsets relative to which the symbols in the
   various sections are (depending where the sections were actually loaded).
   MAINLINE is true if we are reading the main symbol
   table (as opposed to a shared lib or dynamically loaded file).  */

static void
xcoff_initial_scan (objfile, section_offsets, mainline)
     struct objfile *objfile;
     struct section_offsets *section_offsets;
     int mainline;	/* FIXME comments above */
{
  bfd *abfd;
  int val;
  struct cleanup *back_to;
  int num_symbols;			/* # of symbols */
  file_ptr symtab_offset;		/* symbol table and */
  file_ptr stringtab_offset;		/* string table file offsets */
  struct coff_symfile_info *info;
  char *name;
  unsigned int size;

  info = (struct coff_symfile_info *) objfile -> sym_private;
  symfile_bfd = abfd = objfile->obfd;
  name = objfile->name;

  num_symbols = bfd_get_symcount (abfd);	/* # of symbols */
  symtab_offset = obj_sym_filepos (abfd);	/* symbol table file offset */
  stringtab_offset = symtab_offset +
    num_symbols * coff_data(abfd)->local_symesz;

  info->min_lineno_offset = 0;
  info->max_lineno_offset = 0;
  bfd_map_over_sections (abfd, find_linenos, info);

  if (num_symbols > 0)
    {
      /* Read the string table.  */
      init_stringtab (abfd, stringtab_offset, objfile);

      /* Read the .debug section, if present.  */
      {
	sec_ptr secp;
	bfd_size_type length;
	char *debugsec = NULL;

	secp = bfd_get_section_by_name (abfd, ".debug");
	if (secp)
	  {
	    length = bfd_section_size (abfd, secp);
	    if (length)
	      {
		debugsec =
		  (char *) obstack_alloc (&objfile->symbol_obstack, length);

		if (!bfd_get_section_contents (abfd, secp, debugsec,
					       (file_ptr) 0, length))
		  {
		    error ("Error reading .debug section of `%s': %s",
			   name, bfd_errmsg (bfd_get_error ()));
		  }
	      }
	  }
	((struct coff_symfile_info *)objfile->sym_private)->debugsec =
	  debugsec;
      }
    }

  /* Read the symbols.  We keep them in core because we will want to
     access them randomly in read_symbol*.  */
  val = bfd_seek (abfd, symtab_offset, SEEK_SET);
  if (val < 0)
    error ("Error reading symbols from %s: %s",
	   name, bfd_errmsg (bfd_get_error ()));
  size = coff_data (abfd)->local_symesz * num_symbols;
  ((struct coff_symfile_info *)objfile->sym_private)->symtbl =
    obstack_alloc (&objfile->symbol_obstack, size);
  ((struct coff_symfile_info *)objfile->sym_private)->symtbl_num_syms =
    num_symbols;

  val = bfd_read (((struct coff_symfile_info *)objfile->sym_private)->symtbl,
		  size, 1, abfd);
  if (val != size)
    perror_with_name ("reading symbol table");

  /* If we are reinitializing, or if we have never loaded syms yet, init */
  if (mainline
      || objfile->global_psymbols.size == 0
      || objfile->static_psymbols.size == 0)
    /* I'm not sure how how good num_symbols is; the rule of thumb in
       init_psymbol_list was developed for a.out.  On the one hand,
       num_symbols includes auxents.  On the other hand, it doesn't
       include N_SLINE.  */
    init_psymbol_list (objfile, num_symbols);

  free_pending_blocks ();
  back_to = make_cleanup ((make_cleanup_func) really_free_pendings, 0);

  init_minimal_symbol_collection ();
  make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);

  /* Now that the symbol table data of the executable file are all in core,
     process them and define symbols accordingly.  */

  scan_xcoff_symtab (section_offsets, objfile);

  /* Install any minimal symbols that have been collected as the current
     minimal symbols for this objfile. */

  install_minimal_symbols (objfile);

  do_cleanups (back_to);
}

static struct section_offsets *
xcoff_symfile_offsets (objfile, addr)
     struct objfile *objfile;
     CORE_ADDR addr;
{
  struct section_offsets *section_offsets;
  int i;

  objfile->num_sections = SECT_OFF_MAX;
  section_offsets = (struct section_offsets *)
    obstack_alloc
      (&objfile -> psymbol_obstack,
       sizeof (struct section_offsets)
       + sizeof (section_offsets->offsets) * objfile->num_sections);

  /* syms_from_objfile kindly subtracts from addr the bfd_section_vma
     of the .text section.  This strikes me as wrong--whether the
     offset to be applied to symbol reading is relative to the start
     address of the section depends on the symbol format.  In any
     event, this whole "addr" concept is pretty broken (it doesn't
     handle any section but .text sensibly), so just ignore the addr
     parameter and use 0.  rs6000-nat.c will set the correct section
     offsets via objfile_relocate.  */
  for (i = 0; i < objfile->num_sections; ++i)
    ANOFFSET (section_offsets, i) = 0;

  return section_offsets;
}

/* Register our ability to parse symbols for xcoff BFD files.  */

static struct sym_fns xcoff_sym_fns =
{

  /* Because the bfd uses coff_flavour, we need to specially kludge
     the flavour.  It is possible that coff and xcoff should be merged as
     they do have fundamental similarities (for example, the extra storage
     classes used for stabs could presumably be recognized in any COFF file).
     However, in addition to obvious things like all the csect hair, there are
     some subtler differences between xcoffread.c and coffread.c, notably
     the fact that coffread.c has no need to read in all the symbols, but
     xcoffread.c reads all the symbols and does in fact randomly access them
     (in C_BSTAT and line number processing).  */

  (enum bfd_flavour)-1,

  xcoff_new_init,	/* sym_new_init: init anything gbl to entire symtab */
  xcoff_symfile_init,	/* sym_init: read initial info, setup for sym_read() */
  xcoff_initial_scan,	/* sym_read: read a symbol file into symtab */
  xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */
  xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */
  NULL			/* next: pointer to next struct sym_fns */
};

void
_initialize_xcoffread ()
{
  add_symtab_fns(&xcoff_sym_fns);

  func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0,
				"<function, no debug info>", NULL);
  TYPE_TARGET_TYPE (func_symbol_type) = builtin_type_int;
  var_symbol_type =
    init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0,
	       "<variable, no debug info>", NULL);
}